Who's running and who could run in 2016?

Ohio Gov. Jon Kasich is the latest to announce his candidacy for the Republican nomination for president, entering the race on Tuesday. See who else is running and who some of the other possible presidential candidates are.

Ohio Gov. Jon Kasich is the latest to announce his candidacy for the Republican nomination for president, entering the race on Tuesday. See who else is running and who some of the other possible presidential candidates are.